Grandaire / AIR-SOURCE HEAT PUMP

W5H8T36*K*AAA*

2-STAGE 18 SEER HP · source records, page 2

69 published source records · source checked Sep 21, 2026

SEER2 range15.2–17BTU/Wh
HSPF2 range7.8–8.5BTU/Wh
Cooling capacity33,800–38,000BTU/h

Each efficiency range summarizes published EPA records for W5H8T36*K*AAA*. The highest SEER2 and HSPF2 may belong to different combinations. Open a source record below to see its ratings and the scope of its component information.

Model patterns and component strings are preserved exactly. How to read model patterns and combinations →

Heating performance & equipment details

Ranges include the 69 published source records for this model. Values in different rows may describe different configurations. Open an individual record to compare values from the same test configuration.

Reported fieldValue / rangeRecords supplying it
SEER2 · BTU/Wh15.2–1769 / 69
EER2 · BTU/Wh11.7–1369 / 69
HSPF2 · BTU/Wh7.8–8.569 / 69
Cooling capacity · BTU/h33,800–38,00069 / 69
Heating capacity at 47°F / 8.3°C · BTU/h37,200–39,00069 / 69
Heating capacity at 17°F / −8.3°C · BTU/h23,000–24,20069 / 69
Heating capacity at 5°F / −15°C · BTU/h17,500–19,60069 / 69
COP at 5°F / −15°C1.78–2.4869 / 69
Equipment / loop typeHP - Split System69 / 69
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)69 / 69
Compressor stagingTwo-stage69 / 69
Connected capabilityNo69 / 69

47°F = 8.3°C; 17°F = −8.3°C; 5°F = −15°C. COP is dimensionless. These are reported rating points, not a prediction of a particular home’s heat demand or operating limit.

Matched systems

Each row is one source record. The component column distinguishes listed combinations from outdoor-model ratings without an indoor configuration.

Indoor unit / required furnaceSEER2BTU/WhHSPF2BTU/WhHeating capacity at 5°F / −15°CBTU/hCOP at 5°F / −15°CRecord & comparison
W5VC48M21XA*+ furnace: WFEU060B048B*AHRI reference: 21562250515.507.80177001.78EPA 3947158
W5VC48M21XA*+ furnace: WFEU080C060B*AHRI reference: 21562252415.507.80175001.80EPA 3947174
W5A*42M21XA*+ furnace: WFEU080C060B*AHRI reference: 21563666515.508.10188002.24EPA 3955198
W5A*43M21XA*+ furnace: WFEU040B036B*AHRI reference: 21563775515.508.10193002.24EPA 3955521
W5A*43M21XA*+ furnace: WFEU100C060B*AHRI reference: 21563783915.508.10194002.24EPA 3955592
W5A*48M21XA*+ furnace: WFEU040B036B*AHRI reference: 21563884615.508.10192002.24EPA 3955845
W5A*43M21XA*+ furnace: WFET090B048A*AHRI reference: 21563800515.508.10193002.26EPA 3955865
W5A*43M21XA*+ furnace: WFET110C066A*AHRI reference: 21563805615.508.10192002.40EPA 3955898
W5A*43M21XA*+ furnace: WFSU080C060B*AHRI reference: 21563836115.508.10193002.26EPA 3955999
W5A*43M21XA*+ furnace: WFSU100C060B*AHRI reference: 21563838715.508.10194002.24EPA 3956017
W5A*43M21XA*+ furnace: WFST100C060A*AHRI reference: 21563861515.508.10192002.26EPA 3956052
W5A*48M21XA*+ furnace: WFEU060B048B*AHRI reference: 21563887515.508.10190002.28EPA 3956116
W5A*48M21XA*+ furnace: WFEU100C060B*AHRI reference: 21563893315.508.10193002.22EPA 3956155
W5A*48M21XA*+ furnace: WFET110C066A*AHRI reference: 21563914515.508.10191002.26EPA 3956284
W5A*48M21XA*+ furnace: WFST100C060A*AHRI reference: 21563974115.508.10191002.26EPA 3956442
W5A*48M21XA*+ furnace: WFSU100C060B*AHRI reference: 21563952115.508.10191002.26EPA 3956477
W5SH42M12XA*+ furnace: WFEU080C060B*AHRI reference: 21564103415.508.10190002.26EPA 3956737
W5A*43M21XA*+ furnace: WFJT100C060A*AHRI reference: 21572157515.508.00192002.26EPA 3982183
W5A*37M17XA*+ furnace: WFEU040B036B*AHRI reference: 21719152815.508.10188002.26EPA 4010997
W5A*37M17XA*+ furnace: WFEU060B048B*AHRI reference: 21719153015.508.10188002.28EPA 4010999

Sources and documentation

The table uses public EPA ENERGY STAR data. AHRI references are reported by EPA and have not been independently checked with AHRI. Source records do not establish availability, installation suitability or rebate eligibility.

No manufacturer manual has been matched to this model.

Collection method, revision history and known limitations →